• Robert M. Münch (21/21) Jul 10 2002 Hi, I'm playing around with some boot-sector code. All the stuff I found...
• Walter (8/16) Jul 10 2002 so
• Robert M. Münch (14/16) Jul 11 2002 Ok. BTW: How about adding NASM support? This assembler seems to be the
• Walter (5/21) Jul 11 2002 I'm afraid that the linker probably isn't going to work for your project...
• V. Krishnakumar (8/11) Jul 10 2002 so
• Robert M. Münch (15/19) Jul 11 2002 That's right. But I didn't found any documentation for it. Do you have l...

"Robert M. Münch" <robert.muench robertmuench.de> writes:

Hi, I'm playing around with some boot-sector code. All the stuff I found so
far use NASM and some tools from a guy named John Fine to get the correct
binary. I'm sure this can be done with DMC as well. Here are some questions:

1. DMC calls MASM when seeing inline assembler. Can this be switched to
NASM? As the assembler formats of MASM and NASM don't seem to be compatible.

2. How can I create a simple binary file with a start address of 0x7c00. I
tried to use: link /binary:0x7c00 bootf.obj but got this error message. Note
the obj-file was created with NASM.

OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

OPTLINK : Warning 134: No Start Address
bootf.obj(bootf)
 Warning 47: Below 100H Cannot Be Initialized

I would like to use the DMC tools for bootstrapping an own bootsector and a
mini console. Thanks.
--
Robert M. Münch
IT & Management Freelancer
Mobile: +49 (0)177 2452 802
Fax   : +49 (0)721 8408 9112
Web   : http://www.robertmuench.de

"Walter" <walter digitalmars.com> writes:

"Robert M. Münch" <robert.muench robertmuench.de> wrote in message
news:aghkfh$1fhp$1 digitaldaemon.com...
 Hi, I'm playing around with some boot-sector code. All the stuff I found

so
 far use NASM and some tools from a guy named John Fine to get the correct
 binary. I'm sure this can be done with DMC as well. Here are some

questions:
 1. DMC calls MASM when seeing inline assembler. Can this be switched to
 NASM? As the assembler formats of MASM and NASM don't seem to be

compatible.

Just run NASM separately. No need to run it via the DMC shell.

 2. How can I create a simple binary file with a start address of 0x7c00. I
 tried to use: link /binary:0x7c00 bootf.obj but got this error message.

Note
 the obj-file was created with NASM.

The only way this could work is to create a COM file. (-mt memory model)

"Robert M. Münch" <robert.muench robertmuench.de> writes:

"Walter" <walter digitalmars.com> schrieb im Newsbeitrag
news:aghpm8$1kt7$1 digitaldaemon.com...

 Just run NASM separately. No need to run it via the DMC shell.

Ok. BTW: How about adding NASM support? This assembler seems to be the
defacto standard in most projects... and

 The only way this could work is to create a COM file. (-mt memory model)

I tried this but no success either. As said the bootf.obj file was generated
with NASM.

link /tiny /binary:0x7c00 bootf.obj

OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

OPTLINK : Warning 134: No Start Address
bootf.obj(bootf)
 Warning 47: Below 100H Cannot Be Initialized
OPTLINK : Error 46: Start Address Must Be 100H

Robert

"Walter" <walter digitalmars.com> writes:

I'm afraid that the linker probably isn't going to work for your project. It
is designed to create dos/windows executables, not rom images.

"Robert M. Münch" <robert.muench robertmuench.de> wrote in message
news:agjgb0$bpr$1 digitaldaemon.com...
 "Walter" <walter digitalmars.com> schrieb im Newsbeitrag
 news:aghpm8$1kt7$1 digitaldaemon.com...

 Just run NASM separately. No need to run it via the DMC shell.

 Ok. BTW: How about adding NASM support? This assembler seems to be the
 defacto standard in most projects... and

 The only way this could work is to create a COM file. (-mt memory model)

 I tried this but no success either. As said the bootf.obj file was

generated
 with NASM.

 link /tiny /binary:0x7c00 bootf.obj

 OPTLINK (R) for Win32  Release 7.50B1
 Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

 OPTLINK : Warning 134: No Start Address
 bootf.obj(bootf)
  Warning 47: Below 100H Cannot Be Initialized
 OPTLINK : Error 46: Start Address Must Be 100H

 Robert

"V. Krishnakumar" <lvimala eth.net> writes:

"Robert M. Münch" <robert.muench robertmuench.de> wrote in message
news:aghkfh$1fhp$1 digitaldaemon.com...
 Hi, I'm playing around with some boot-sector code. All the stuff I found

so
 far use NASM and some tools from a guy named John Fine to get the correct
 binary. I'm sure this can be done with DMC as well. Here are some

questions:

You must be using his JLoc linker/loader. The intended purpose of this tool
is to produce bootsectors. Its a very flexible linker that requires you
write a script for every new link.

-Krish

"Robert M. Münch" <robert.muench robertmuench.de> writes:

"V. Krishnakumar" <lvimala eth.net> schrieb im Newsbeitrag
news:agio41$2icq$1 digitaldaemon.com...

 You must be using his JLoc linker/loader.

That's right. But I didn't found any documentation for it. Do you have link
for docs?

 The intended purpose of this tool is to produce bootsectors.

Hmmm... is this task so special for other linkers?

 Its a very flexible linker that requires you
 write a script for every new link.

Yep, just a simple config file. It works but I would like to use DMC for the
complete task:

1. Write Bootsector code with inline ASM
2. Use C for the "kernel" part.

--
Robert M. Münch
IT & Management Freelancer
Mobile: +49 (0)177 2452 802
Fax   : +49 (0)721 8408 9112
Web   : http://www.robertmuench.de